From d20046e64c099377f7e82583eb4ddf3a800fd19f Mon Sep 17 00:00:00 2001 From: Tyrel Datwyler Date: Thu, 14 Jan 2021 14:31:35 -0600 Subject: [PATCH] scsi: ibmvfc: Add Sub-CRQ IRQ enable/disable routine Each Sub-CRQ has its own interrupt. A hypercall is required to toggle the IRQ state. Provide the necessary mechanism via a helper function. Link: https://lore.kernel.org/r/20210114203148.246656-9-tyreld@linux.ibm.com Reviewed-by: Brian King Signed-off-by: Tyrel Datwyler Signed-off-by: Martin K. Petersen --- drivers/scsi/ibmvscsi/ibmvfc.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c index bad0dae..04efaa4 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.c +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -3465,6 +3465,26 @@ static void ibmvfc_tasklet(void *data) } } +static int ibmvfc_toggle_scrq_irq(struct ibmvfc_queue *scrq, int enable) +{ + struct device *dev = scrq->vhost->dev; + struct vio_dev *vdev = to_vio_dev(dev); + unsigned long rc; + int irq_action = H_ENABLE_VIO_INTERRUPT; + + if (!enable) + irq_action = H_DISABLE_VIO_INTERRUPT; + + rc = plpar_hcall_norets(H_VIOCTL, vdev->unit_address, irq_action, + scrq->hw_irq, 0, 0); + + if (rc) + dev_err(dev, "Couldn't %s sub-crq[%lu] irq. rc=%ld\n", + enable ? "enable" : "disable", scrq->hwq_id, rc); + + return rc; +} + /** * ibmvfc_init_tgt - Set the next init job step for the target * @tgt: ibmvfc target struct -- 2.7.4